phy: stm32: ensure phy are no more active when removing the driver

To ensure a good balancing of regulators, and allow PLL disabling when the
driver is removed, call stm32_usbphyc_phy_exit on each ports to set phys
inactive and disable PLL.
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20210105090525.23164-6-amelie.delaunay@foss.st.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/st/phy-stm32-usbphyc.c

@@ -470,6 +470,12 @@ static int stm32_usbphyc_probe(struct platform_device *pdev)
 static int stm32_usbphyc_remove(struct platform_device *pdev)
 {
 	struct stm32_usbphyc *usbphyc = dev_get_drvdata(&pdev->dev);
+	int port;
+
+	/* Ensure PHYs are not active, to allow PLL disabling */
+	for (port = 0; port < usbphyc->nphys; port++)
+		if (usbphyc->phys[port]->active)
+			stm32_usbphyc_phy_exit(usbphyc->phys[port]->phy);
 
 	clk_disable_unprepare(usbphyc->clk);